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Diffstat (limited to 'include/asm-ppc/prom.h')
| -rw-r--r-- | include/asm-ppc/prom.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/include/asm-ppc/prom.h b/include/asm-ppc/prom.h new file mode 100644 index 00000000000..56394c6cf52 --- /dev/null +++ b/include/asm-ppc/prom.h @@ -0,0 +1,143 @@ +/* + * Definitions for talking to the Open Firmware PROM on + * Power Macintosh computers. + * + * Copyright (C) 1996 Paul Mackerras. + */ +#ifdef __KERNEL__ +#ifndef _PPC_PROM_H +#define _PPC_PROM_H + +#include <linux/config.h> +#include <linux/types.h> + +typedef u32 phandle; +typedef u32 ihandle; + +extern char *prom_display_paths[]; +extern unsigned int prom_num_displays; + +struct address_range { + unsigned int space; + unsigned int address; + unsigned int size; +}; + +struct interrupt_info { + int line; + int sense; /* +ve/-ve logic, edge or level, etc. */ +}; + +struct reg_property { + unsigned int address; + unsigned int size; +}; + +struct property { + char *name; + int length; + unsigned char *value; + struct property *next; +}; + +/* + * Note: don't change this structure for now or you'll break BootX ! + */ +struct device_node { + char *name; + char *type; + phandle node; + int n_addrs; + struct address_range *addrs; + int n_intrs; + struct interrupt_info *intrs; + char *full_name; + struct property *properties; + struct device_node *parent; + struct device_node *child; + struct device_node *sibling; + struct device_node *next; /* next device of same type */ + struct device_node *allnext; /* next in list of all nodes */ +}; + +struct prom_args; +typedef void (*prom_entry)(struct prom_args *); + +/* OBSOLETE: Old style node lookup */ +extern struct device_node *find_devices(const char *name); +extern struct device_node *find_type_devices(const char *type); +extern struct device_node *find_path_device(const char *path); +extern struct device_node *find_compatible_devices(const char *type, + const char *compat); +extern struct device_node *find_all_nodes(void); + +/* New style node lookup */ +extern struct device_node *of_find_node_by_name(struct device_node *from, + const char *name); +extern struct device_node *of_find_node_by_type(struct device_node *from, + const char *type); +extern struct device_node *of_find_compatible_node(struct device_node *from, + const char *type, const char *compat); +extern struct device_node *of_find_node_by_path(const char *path); +extern struct device_node *of_find_all_nodes(struct device_node *prev); +extern struct device_node *of_get_parent(const struct device_node *node); +extern struct device_node *of_get_next_child(const struct device_node *node, + struct device_node *prev); +extern struct device_node *of_node_get(struct device_node *node); +extern void of_node_put(struct device_node *node); + +/* Other Prototypes */ +extern void abort(void); +extern unsigned long prom_init(int, int, prom_entry); +extern void prom_print(const char *msg); +extern void relocate_nodes(void); +extern void finish_device_tree(void); +extern int device_is_compatible(struct device_node *device, const char *); +extern int machine_is_compatible(const char *compat); +extern unsigned char *get_property(struct device_node *node, const char *name, + int *lenp); +extern void prom_add_property(struct device_node* np, struct property* prop); +extern void prom_get_irq_senses(unsigned char *, int, int); +extern int prom_n_addr_cells(struct device_node* np); +extern int prom_n_size_cells(struct device_node* np); + +extern struct resource* +request_OF_resource(struct device_node* node, int index, const char* name_postfix); +extern int release_OF_resource(struct device_node* node, int index); + +extern void print_properties(struct device_node *node); +extern int call_rtas(const char *service, int nargs, int nret, + unsigned long *outputs, ...); + +/* + * PCI <-> OF matching functions + */ +struct pci_bus; +struct pci_dev; +extern int pci_device_from_OF_node(struct device_node *node, + u8* bus, u8* devfn); +extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int); +extern struct device_node* pci_device_to_OF_node(struct pci_dev *); +extern void pci_create_OF_bus_map(void); + +/* + * When we call back to the Open Firmware client interface, we usually + * have to do that before the kernel is relocated to its final location + * (this is because we can't use OF after we have overwritten the + * exception vectors with our exception handlers). These macros assist + * in performing the address calculations that we need to do to access + * data when the kernel is running at an address that is different from + * the address that the kernel is linked at. The reloc_offset() function + * returns the difference between these two addresses and the macros + * simplify the process of adding or subtracting this offset to/from + * pointer values. See arch/ppc/kernel/prom.c for how these are used. + */ +extern unsigned long reloc_offset(void); +extern unsigned long add_reloc_offset(unsigned long); +extern unsigned long sub_reloc_offset(unsigned long); + +#define PTRRELOC(x) ((typeof(x))add_reloc_offset((unsigned long)(x))) +#define PTRUNRELOC(x) ((typeof(x))sub_reloc_offset((unsigned long)(x))) + +#endif /* _PPC_PROM_H */ +#endif /* __KERNEL__ */ |